Nail expansion and method



Dec. 29 1925. 1,567,273

- J. KARITZKY NAIL EXPANSION AND METHOD Filed Sept. 20, 1924 2 Sheets-Sheet 1 Use. 29 1925.

J. KARITZKY NAIL EXPANSION AND METHOD Filed Sept. 20, 1924 2 Sheets-Sheet 2 [Ill/11m ATTORNE i atented Dec. 29, 1925.

JOEE HABI'I'ZKY, BF GAE/WOOD, NEW JERSEY, ASSIGNOR TO HENRY B. NEWHALL,

(1F PLAINFIJELID, NEW JERSEY.

NAIL EXPANSION AND METHOD. i

Application filed September 20, 1924.

To all whom it may comem:

Be it known that I, JOHN KARrrzKY, a citizen of the United States, residing at Garwood, in the county of Union and State of New Jersey, have made a certain new and useful Improvement in Nail Expansions and Methods, of which the following is a specification,'taken in connection with the accompanying drawings.

My invention relates to expansion members, and more particularly to a nail expansion and the method of making it.

My invention further relates to an expansion shield formed by bending different strands of wire upon themselves to obtain a cheap and simple expansion shield, and one which is-adapted to be expanded in two di rections, provided the expanding member is of sufficient length to insure the secondary expansion. It is to be, understood, however, that my expansion shield will operate successfully simply with the primary expan sion, though preferably I employ an expanding member of sufiicient length to insure that there will be both the primary and secondary expansions.

My invention further relates to certain methods, combinations, details of construction and articles of manufacture which will be more fully hereinafter described and pointed out in the claims.

In the accompanying drawing the same reference numerals refer to similar parts in the several figures.

Fig. i is a perspective view of a length of wire bent back upon itself showing the first stage of manufacturing my wire shield;

Fig. 2 is a perspective view of the complete wire shield formed by bending the double wire,'shown in Fig. 1, upon itself, and also bending o.t the wire in opposite directions, to form a head for the shield;

F ig. 3 is a vertical section showing my wire shield mounted in a wall or other suitable support, and about to be expanded by a nail;

Serial No. 738,864.

Fig. 7 is a vertical section, similar to Figs. 3 and 5, showing the nail. driven home, and causing the secondary expansion of the shield at an angle to the primary expansion shown in Figs. 5 and 6;

Fig. 8 is a horizontal section, on the line 8--8 of Fig. 7, looking up in the direction of the arrows, and showing the wire shield after both the primary and secondary c2;- pensions;

Fig. 9 is a perspective view, somewhat exaggerated, to show the effect on the shield of both the primary and secondary expansions, the nail being omitted.

In my invention a cheap grade of commercial soft wire 1, cutto the particular length desired for any particular size shield, is bent back upon. itself, as shown in Fig. 1 to form two strands. This double strand of wire is then bent, substantially midway between its ends, so that a wire shield 2 is formed having strands 3, 4'.- 5 and 6. The ends of the strands 5 and 6 are then bent up to form the integral head 7 of the wire shield 2, while the ends of the strands 3 and 4 are bent down at 8, 8 to form the other portion of the head of the wire shield 2.

These four strands 3, l, 5 and (3 form the walls of the axial bore 9 of the wire shield, through which is forced the nail 10.

A hole 11 of the required size is drilled. or otherwise formed, in the wall 12 of brick, masonry, concrete, stone or any other suitable nmt crial, and into this hole is placed the wire shield 2., first passing it through the hole '13 in the work 14, which is shown for purpose of illustration as a bracket. The head 7 and 8 of the shield lies on the exterior surface of the work 14, as shown in Fig. 3, and in the other figures of the drawmg. 4

lVhen the nail 10, or other expanding member, is driven into the wire shield 2 it is guided along the axial bore 9 by the four strands 3, at, 5 and 6 of the wire shield. The nail is held on center by the four strands so that. it is impossible for the nail to be deflected sidewise and project outside the circumference of the shield. The first expansion, that shown in Figs. 5 and '6, is in a vertical direction, the nail 1Q forcing the strands 5 and 6 and 3 and 4t away from driven further into the wire shield 2 the end 15 of the nail reaches the end 16 of the wire shield and causes a secondary expansion by forcing the bentends 17,17 away from each other, in a horizontal direction, at substantially 90 from the direction of the primaryexpansion. This secondary expansion 15 shown more clearly in Figs. 7 and 8, and exaggerated in Fig. 9. It will, therefore, be clear that when the nail 10 is driven home the work 14, whatever it may be, will be held to the wall, or other suitable support 12, first by the primary vertical expansion of the strands 3 and 4; being separated from the strands 5 and 6, and subsequently a further secondary expansion when the bent ends 17, 17 are forced apart in a horizontal lane. Ihis insures that the work 14: will e securely held by a double expansion which will prevent the parts working loose and will insure a maximum'grip or hold with minimum size expansion shield for the particular load or work to be held. I

It will be noted that my expansion shield can be made at minimum cost, that it is simple, and will have the maximum etliciency for a given size shield. Being formed out of an integral piece of wire there are no parts to be assembled and consequently no parts to be lost, and no time is consumed in assembling. It is further to be noted that m wire shield is an open construction whic will freely allow galvanizing by the hot process after it has been made.

My wire shield may be formed by hand with a pair of pliers but preferably 1t Wlll be made in large quantities, in a wire forming machine where one operation of two movements will make the complete w1re shield.

Having thus described this invention in connection with an illustrative embodiment thereof, to the details of which I do not desire to be limited, what is claimed as new and what is desired to secure by Letters Patent is set forth in the appended claims' What I claim is 1. The method of manufacturing a wire nail expansion consisting in bending a strand of wire back on itself to form a two strand wire, then bending the two strand wire on itself to form a four strand expansible shield.

2. The method of manufacturing a wire nail expansion consisting in bending a strand of wire back on itself to form a two strand Wire, then bending the two strand rename wire on itself to form .a four strand expanv bent back on itself to form a longitudinally extending bore, said bore being surrounded b .a maximum of four parallel and longitudmally extending strands of wire and having a wire head at an angle to the parallel strands of wire.

4. A new article of manufacture compris ing a wire expansion shield formed of wire bent back on itself to form for parallel longitudinally extending strands of wire and an integral wire head formed in two parts.

5. In an expansion the combination of a wire shield formed by bending strands of wire back on themselves so that when expanded the shield will have a primary radial expansion in one direction, and a secondary radial expansion in a difierent direction, and an expanding member adapted to first cause the primary radial: expansion in one direction on partial insertion of the expanding member, and cause the secondar radial expansion of the wire shield in a itferent direction on the complete insertion of the expanding member.. t

6. In an expansion the combination of a,

wire shield formed by bending strands of wire back on themselves to form'pa'rallel and longitudinally-extending strands so that when ex ended the shield will have a primary ra ial expansion in one direction, and a secondary radial expansion in a difirent direction,and an expanding member adapted to first cause the primary expansion in one direction on partial insertion of the expending member, and cause the secondary expansion of the wire shield in a. difierent direction on the complete insertion of the axe panding member.

7. In n expansion the combination of a wire shield formed by bending strands of wire back on themselves so that when expanded the shield will have aprimary radial expansion in one direction, and a secondary radial expansion in a dilferent direction, and an ordinary nail adaptedto first 'cause the primary expansion of the wire shield in one direction on partial insertion of the nail, and to cause the secondary expansion of the wire shield in a diflerent direction on the complete insertion of the nail.

JOHN KARITZKY. 

